title: Effects of varying estuarine conditions on the sorption of phenanthrene to sediment particles of Yangtze Estuary.
abstract: The sorption of phenanthrene on the Yangtze Estuary sediment was studied under varying conditions of particle size, sediment organic contents, salinity, and dissolved organic matter (DOM) concentrations. Small sediment particles showed higher trapping capacity for phenanthrene due to the higher organic contents associated. The organic carbon-based partition coefficient of phenanthrene to the Yangtze Estuary sediment was obtained as 7120 L/kg, lower than the values for other soils or sediments reported in previous studies. The magnitude and direction of the salt effect were complicated by the specific DOM studied. The sediment sorption capacity was greatly increased in saline water in the absence of DOM but decreased in the presence of DOM. Given the conditions in the Yangtze Estuary, the equilibrium sorption of phenanthrene would be decreased with increasing salinity. Overall, the nature and content of both sediment-bound and dissolved organic matter dominate the sorption of hydrophobic organic contaminants in the estuary.
authors.affiliation: State Key Joint Laboratory of Environment Simulation and Pollution Control, School of Environment, Beijing Normal University, Beijing 100875, China.
authors.forename: Jing
authors.initials: J
authors.lastname: Shang
authors.forename: Jing
authors.initials: J
authors.lastname: Chen
authors.forename: Zhenyao
authors.initials: Z
authors.lastname: Shen
authors.forename: Ying
authors.initials: Y
authors.lastname: Wang
authors.forename: Aidong
authors.initials: A
authors.lastname: Ruan
mesh_terms: D000327:Adsorption; D004784:Environmental Monitoring; D063366:Estuaries; D019015:Geologic Sediments / Q000737:chemistry*; D057927:Hydrophobic and Hydrophilic Interactions; D010616:Phenanthrenes / Q000032:analysis*; D014874:Water Pollutants, Chemical / Q000032:analysis*
chemical_list: D010616:Phenanthrenes; D014874:Water Pollutants, Chemical; C031181:phenanthrene
keywords: Hydrophobic organic contaminant; Partition coefficient; Salting constant; Sediment organic matter; Sediment size fraction